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Full-Text Articles in Social and Behavioral Sciences
Haptic Perception Of The Horizontal By Blind And Low-Vision Individuals, Morton A. Heller, Deneen D. Brackett, Eric Scroggs, Angela C. Allen, Shavonda Green
Haptic Perception Of The Horizontal By Blind And Low-Vision Individuals, Morton A. Heller, Deneen D. Brackett, Eric Scroggs, Angela C. Allen, Shavonda Green
Morton A. Heller
We examined haptic perception of the horizontal in visually impaired people. Blind people (late blind and congenitally blind), persons with very low vision, and blindfolded sighted individ- uals felt raised-line drawings of jars at four angles. They had to demonstrate their understanding that water remains horizontal, despite jar tilt, by selecting the correct raised-line drawing given four choices. Low-vision subjects, with near perfect scores, performed significantly better than the other groups of subjects. While the late-blind and blindfolded sighted subjects performed slightly better than the congenitally blind participants, the difference between the late-blind and congenitally blind groups was nonsignificant. The …
Stock Optimizing In Choice When Toke Deposit Is The Operant, Abdulrazaq Imam, J Widholm, A Silberberg, S Hursh, F Warren-Boulton
Stock Optimizing In Choice When Toke Deposit Is The Operant, Abdulrazaq Imam, J Widholm, A Silberberg, S Hursh, F Warren-Boulton
Abdulrazaq A. Imam
Each of 2 monkeys typically earned their daily food ration by depositing tokens in one of two slots. Tokens deposited in one slot dropped into a bin where they were kept (token kept). Deposits to a second slot dropped into a bin where they could be obtained again (token returned). In Experiment 1, a fixed-ratio (FR) 5 schedule that provided two food pellets was associated with each slot. Both monkeys preferred the token-returned slot. In Experiment 2, both subjects chose between unequal FR schedules with the token-returned slot always associated with the leaner schedule. When the FRs were 2 versus …
Speed Contingencies, Number Of Stimulus Presentations, And The Nodality Effect In Equivalence Class Formation, Abdulrazaq A. Imam
Speed Contingencies, Number Of Stimulus Presentations, And The Nodality Effect In Equivalence Class Formation, Abdulrazaq A. Imam
Abdulrazaq A. Imam
Rats worked under a fixed-ratio (FR) 45 schedule of reinforcement during 4-hr long sessions either in 16 15-min work periods (2 rats in Exps 1 and 3) or in a single work period (3 rats in Exps 2 and 4) while receiving varying amounts of external food. In Exps 1 and 2, a fixed amount of external food was provided in different conditions, whereas in Exps 3 and 4, both earned and total food intake were fixed to a daily maximum. Consumption and responding decreased with availability compared to nonavailability of external food and systematically declined with increasing amounts of …